//receive JSON data from Add.js. (When an item is added to the cart from gallery)
public JsonResult AddItemToCart([FromBody] Addinput product)
{
string sessionId; try { sessionId = HttpContext.Request.Cookies["sessionId"]; } catch (NullReferenceException) { sessionId = null; }
string userId; if (sessionId != null)
{
userId = HttpContext.Request.Cookies["userId"];
}
else
{
userId = Environment.MachineName;
}
CartItem item = db.Cart.FirstOrDefault(x => x.UserId == userId && x.pId == product.ProductId);
if (item == null)
{
item = new CartItem();
item.UserId = userId;
item.pId = product.ProductId;
item.Quantity = 1;
item.product = db.Products.FirstOrDefault(x => x.ProductId == int.Parse(product.ProductId));
db.Add(item);
}
else
{
item.Quantity += 1;
db.Update(item);
}
db.SaveChanges();
List <CartItem> cart = db.Cart.Where(x => x.UserId == userId).ToList();
int total = 0;
foreach (CartItem x in cart)
{
total += x.Quantity;
}
return(Json(new
{
status = "success",
total = total
}));
}
public JsonResult RemoveItem([FromBody] Addinput productId)
{
string sessionId = HttpContext.Request.Cookies["sessionId"];
int id = int.Parse(productId.ProductId);
Session session = db.Sessions.FirstOrDefault(x => x.Id == sessionId);
//if the user is not login, their session will be null
if (session == null)
{
//fakeUserId is a cookies that will be sent to the guest(not login) to track their activity
string fakeUserId = HttpContext.Request.Cookies["cartItems"];
CartItem cartitem = cartitems.map[fakeUserId];
//inside cartitem class is a list of KeyValuePair of <int,int> --> can refer to the cartitem class file for more information
//KeyValuePair is used to store the productid and quantity of each of the products.
for (int i = 0; i < cartitem.item.Count(); i++)
{
if (cartitem.item[i].Key == id) //get the KeyValuePair of that particular product and increment the quantity by 1
{
cartitem.item.Remove(cartitem.item[i]);
}
}
cartitems.map[fakeUserId] = cartitem; //update the cartitems (cartitems is a singleton object that store cartitem of guest)(Same idea as sessions in the workshop)
}
else //else if the user has login
{
List <Cart> carts = db.Carts.Where(x => x.UserId == session.UserId).ToList(); //get the carts information of the user
foreach (Cart item in carts) //get the cart row and increment the quantity by 1
{
if (item.ProductId == id)
{
db.Carts.Remove(item);
db.SaveChanges();
}
}
}
return(Json(new
{
status = "success"
}));
}
public JsonResult DeleteCartItem([FromBody] Addinput product)
{
string sessionId; try { sessionId = HttpContext.Request.Cookies["sessionId"]; } catch (NullReferenceException) { sessionId = null; }
string userId; if (sessionId != null)
{
userId = HttpContext.Request.Cookies["userId"];
}
else
{
userId = Environment.MachineName;
}
CartItem item = db.Cart.FirstOrDefault(x => x.UserId == userId && x.pId == product.ProductId);
db.Cart.Remove(item);
db.SaveChanges();
return(Json(new
{
status = "success"
}));
}
//receive JSON data from Add.js. (When an item is added to the cart from gallery)
public JsonResult Addin([FromBody] Addinput addinput)
{
Session session = db.Sessions.FirstOrDefault(x => x.Id == HttpContext.Request.Cookies["sessionId"]);
bool newItem = true;
int productid = int.Parse(addinput.ProductId);
int total = 0;
//if the user is not login, their session will be null
if (session == null)
{
//fakeUserId is a cookies that will be sent to the guest(not login) to track their activity
string fakeUserId = HttpContext.Request.Cookies["cartItems"];
CartItem cartitem;
//if they dont have this cookies(null), create a cookie of fakeUserId and send to them
if (fakeUserId == null)
{
fakeUserId = Guid.NewGuid().ToString();
Response.Cookies.Append("cartItems", fakeUserId);
cartitem = new CartItem();
}
else //else if they have the fakeUserId cookie, find their record from the cartitems
{
cartitem = null;
cartitems.map.TryGetValue(fakeUserId, out cartitem); //check if the fakeUserId is in our record or not
if (cartitem == null) //if its not in our record
{
cartitem = new CartItem();
}
}
//inside cartitem class is a list of KeyValuePair of <int,int> --> can refer to the cartitem class file for more information
//KeyValuePair is used to store the productid and quantity of each of the products.
foreach (KeyValuePair <int, int> item in cartitem.item)
{
if (item.Key == productid) //to check if the product has been added before
{
newItem = false;
}
}
if (cartitem.item.Count() == 0 || newItem == true) //if its a new product or the list is empty
{
cartitem.item.Add(new KeyValuePair <int, int>(productid, 1)); //Add a new KeyValuePair of this productid with quantity of 1
}
else
{
for (int i = 0; i < cartitem.item.Count(); i++)
{
if (cartitem.item[i].Key == productid) //get the KeyValuePair of that particular product and increment the quantity by 1
{
int quantity = cartitem.item[i].Value;
cartitem.item.Remove(cartitem.item[i]);
cartitem.item.Add(new KeyValuePair <int, int>(productid, quantity + 1));
break;
}
}
}
cartitems.map[fakeUserId] = cartitem; //update the cartitems (cartitems is a singleton object that store cartitem of guest)(Same idea as sessions in the workshop)
//this part is to get the total quantity of products that the guest has. So that can be reflected on the cart image.
for (int i = 0; i < cartitem.item.Count(); i++)
{
total += cartitem.item[i].Value;
}
}
else //else if the user has login
{
List <Cart> carts = db.Carts.Where(x => x.UserId == session.UserId).ToList(); //get the carts information of the user
foreach (Cart item in carts) //check if its a item or not
{
if (item.ProductId == productid)
{
newItem = false;
}
}
if (carts.Count() == 0 || newItem == true) //if its a new item or the user has no items in his cart
{
Cart item = new Cart
{
UserId = session.UserId,
ProductId = productid,
Quantity = 1
};
db.Add(item);
db.SaveChanges();//save the item to the user cart database
}
else //else if its not a new item
{
foreach (Cart item in carts)//get the cart row and increment the quantity by 1
{
if (item.ProductId == productid)
{
item.Quantity += 1;
db.SaveChanges();
}
}
}
//this part is to get the total quantity of products that the user has. So that can be reflected on the cart image.
carts = db.Carts.Where(x => x.UserId == session.UserId).ToList();
foreach (Cart item in carts)
{
total += item.Quantity;
}
}
//return the total as JSON to the Add.js
return(Json(new
{
status = "success",
total = total
}));
}
